Ionia Weather Forecast

    • 55
    • 61

    Rain Showers

    • 53
    • 63

    Cloudy

    • 54
    • 68

    Mostly Cloudy

    • 61
    • 74

    Mostly Cloudy

    • 59
    • 78

    Chance Rain Showers

    • 45
    • 66

    Chance Rain Showers

    • 44
    • 63

    Partly Sunny

Today 27 Sep Ontario

Partly sunny. Highs in the lower 60s.

Tonight 27 Sep Ontario

Cloudy. A chance of Showers through the early overnight. Some patchy fog. Lows in the mid 50s. Light northeast Winds. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ionia Temperature Statistics

September Temperature

Rochester, Greater Rochester International Airport (15.5 miles)

  • Lowest 25 September, 2026

    39.9 °F

  • Average September

    64.9 °F

  • Highest 2 September, 2026

    85.6 °F

Climate (2021–2026)

Rochester, Greater Rochester International Airport (15.5 miles)

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  • Average Low 2021–2026

    42.2 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.5 °F
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